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WAsIIINeToN Bever. or rUsooLA, ILLINOIS..

Letters Patent No. 9,343,' dated December 28, `1869; antedated December 17, 1869.

*HOF- IMPROVE!) APPARATUS FOB. FILTERING- VOLATILE LIQUIDS.

The Schedule referred to in these Letten Paent and making part of the same To all whmn. it may concern:

Be it known that I, WASHINGTON Boven, of Tuscola, in the county of Douglas, and in the State of Illinois, have invented certain new and useful-Improvements in `Filters; and do hereby declare that the following is a full, clear, aud exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon.

The object of my invention is to provide a filter' for nearly every liquid, but more especially for those light, volatile fluids, such as collodion and varnishcs, which evaporate rapidly upon being exposed to the air. I Whenever' an attempt is made to filter one of these fluids in the ordinary rnethoda large proportion is lost by evaporation, and it is to prevent this loss that my invention is intended.

Figure l represents a section view of my invention, as it appears when placed in the neck of the bottle-or receiver. y. i

Figure 2 is a section view of the plunger, showing the openings ,near its bottom, and the perforation extending through its-whole length. y

Figure 3 is a side view of the plunger, with the floss or wrapping-material removed.

LetterA represents the cup, into which the fluid to be filtered is placed, and it may either be ofthe shape shown iu the drawings, or any other suitable one, and

can. be constructed of wood, glass, metal, or gut-ta percha.

` Inside of this cup A is placed the plunger B, which` is provided with a perforation extending from top to bottom, so as to allow the air, displaced by the fluids owing into the bottle, to rise up into the cup. The lower end of this plunger is ground so as to fit, air'- tiglrt, into its sent in the lower' part of the cup A, as seen in tig. 1. The lower half of this pluugeris much larger than the upper one, and is shaped like a cone, having small grooves cut into its sides, running downward to the sruall holes, through which the liuids flow isgplaced around the lower endvof' the cup A, where it comes into contact with the neck ofthe bottle.

Letter E represents a movable cover for the cup A,

which is made to lit air-tight, and can either be made in this shape,or ground so as to fit in a socket, and is provided so as to prevent access ,of the air to the liquid while being ltered.

Having thus described my' invention, What I claim, and desire to secureby Letters Patent, is-

- 1. The cup A, providedwith the movable cover -E and rubber band D, so as to form an air-tight connection with the bottle or receiver C. A

2. The perforated plunger B, the lower" end of 'which is shaped like a cone, and which is provided with the grooves and openings, in the manner and for the purpose specilied.

3. In combination with the above plunger, the floss, silk, or cotton wrappiugs, when used in the 'manner and for.the purpose specilied.

4. The combination ot the cup A and the plunger l B, when used in the maunerand for the purpose specified.

In testimony that I claim 'the' foregoing, I have herelunto set my hand, this 30th day ot' March, 1869.

VASHINGTON yROYCE.

Witnesses:

A. G. WALLACE, M. Sroors. 

